Groen



'July M1952 w. GROEN 2,603,256

DUAL TABLE AUTOMATIC SHAPER Filed 'April 15. 1949 6 sheets-sheet 1 FIG!ATT'YS July 15, l952 w. GROEN 2,603,256

A DUAL TABLE AUTOMATIC SHAPER Filed'April 1s. l1949 e sheets-sheet 2 A lINVENToR: y WILLEM GROEN y l E952 w. GRQEN DUAL TABLE AUTOMATIC SHAPERFiled April 13, y1949 6 Sheets-Sheet 3 FIG. 5

INVENTOR.' WIL LEM GROEN BY A lvm ATT'YS July i5, 1952 w. GROEN2,603,256

DUAL TABLE AUTOMATIC SHAPER `Filed April 13'. 1949 '6 Sheets-Sheet 4 1l1 1l 1111// 1111/1/11 l /l/ JNVENToR.- WIL LEM GROEN ATT'YS July 15,1952 W GROEN 2,603,256

DUAL TABLE AUTOMATIC SHAPER Filed April 13, 1949 6 Sheets-Sheet 5 12FIG. 9 7,

7b j ``55 /54 se Il||| uw HHHHH 47 y vh/ f x 5o 69 7 A www www 5' sa/ A`5? 59 5o f g J 4s lso 44 l i 48 45 I I es 6l' j81% |llllul" Y N3 e' lnl) l I es i I I. I h. 65 s, 76' JNVENTOR.-

WILLEM GROEN ATT'Ys July 15, 1952 w. GROEN DUAL TABLE AUTOMATIC SHAPER 6Sheets-Sheet 6 Filed April 15. 1949 INVENTOR:

ATTYs WILLEM GROEN uw. .....MHn M 8 A.. l f a) www/ Patented July is,1952 2,603,256

. 2,603,256 DUAL TABLE AUTOMATIC SHAPER- Willem Groen, Chicago, Ill.,assignor to Onsrud Machine Works, Inc., Chicago, Ill., a corporation ofIllinois A vApplication April 13, 1949, s'erial'No. 87,2%

This invention relates to automatic shaping machines and particularlydual table. machines for shaping small parts according to apredetermined pattern and wherein one table is in automatic shapingoperation while the other table is being unloaded and reloadedby theoperator.

IIhe main objects of this invention are to provide an improved dualtable automatic shaper; to provide an improved Shaper construction foraccurate high speed production-shaping of small parts; to provide such adevice in which all mechanical operation or movement of the machinecomponents is wholly automatic; to provide such a device'wherein thework clamping, cutter movement and table drive operations maybeaccurately timed and controlled to allord a maximum of safety for theoperator; and to provide an automatic shaper that may be safely operatedby non-skilled labor.

Other objects are to provide a high speed production shaper havingimproved control for the cutter movement between dual operating tables;to provide an improved means for cushioning the engagement of the cutterwith the work in high speed shaper operation; to provide a vShaperhaving improved means to shift the cutter from Vone work table toanother; to provide a dual table shaper vhaving an improved work tabledrive and speed control; to provide a Shaper having an improvedarrangement for adjusting the operating height of the work clamps andthe cutter in relation to the work and the pattern; and to provide animproved dual table shaper construction of simplified design which ismore convenient for the operator, requires a minimum of space andpermits substantially continuous production.

A specific embodiment of this invention is shown in the accompanyingdrawings in which:

Figure 1 is a perspective view showing the improved automatic shaperfrom the front quarter.

Fig. 2 isa fragmentary perspective view of' the same, from the left siderear quarter, showing the location of the means for snubbing the cutterarm movement.

Fig. 3 is a right hand side elevation of the same with a part of thebase side wall broken away to show the work table means drive andtheFig. '7 is a similar view, taken on line `'I-'I of 22 claims. (o1.14a-139i Fig. 3, to 'show the cutter arm operating means. Fig. 8 isaschematic plan view illustrating the principle of operation of thecutter arm snubbing means,V the view being similar to Fig. 5 with re'spect to the elements shown;

`Fig. 9 is a vertical sectional View of the work table and work clampingmeans, as taken on the line 9-9 of Fig. 5, a part of the work tablebeing broken away. j

Fig. 10 is a partially sectioned view, as taken on line Ill- I0 of Fig.6, showing the work table drivetransmission and the shifting meansvthere- 4 for.

Fig. 11 is a perspective view showing the work table drive transmissionfrom the rear side thereof, as viewed from the line II-II of Fig. 10,and

Fig. 12 is a diagram showing the air connections for pneumatic operationand control of the machine.

Inl the form shown in the drawings `the im-- ranged to hold the work onthe respective tables;

and a cutter arm 8, pivotally mounted to the rear of the work tables',having a free end arranged to swing from side to side to cause arotatable cutter 9 toengage withthe work carried bythe work tables.

The work tables 4 and 5 are mounted on lthe cover plate 3 and arearranged Vtobe rotated on vertical axes; and the cutter arm 8 is dis`posed above thev work tables and is mounted to pivot on a vertical axislocated at the rear of the base on the fore and aft centerline betweenthe work tables. Thus the cutter arm extends radially forward and itsfree end, which projects beyond a horizontal line through the axes ofthe work tables, may swing between the table axes and over. the toplsurface of either table.v

Thercutter 9 is carried on the end of a down- -wardly projecting spindleI0, which in turn is carried by the cutter arm 8 adjacent its free` end,and is mounted for rotation on a verticalaxis parallel with the axes ofthe tables and with the pivot axisof the cutter arm. The spindle I isrotated by'means Oia belt and pulley drive,

not shown, extending lengthwise of the cutter. arm and driven by a motorI I which` is mountedv on. a suitable bracket I2 at the rearward end ofthe cutter arm, the motorbracket being an in-A tegral part of the cutterarm so that the armand the spindle. drive swing together as aunitduringpivotal movement ofthe arm. f

Details off-the cutter arm are `not shown for they reasothatno inventionis'lclaimed herein forv 3 the arm per se and it is therefore sufhcientto explain that the cutter arm comprises a rigid casting 8.1 mounted, bya hub at one end, on a rotatable steel column or post 13, disposedvertically in the rearward part of the base I and .prof jecting upwardlyabove the top plate 3. The column 13, which provides the axis on whichthe cutter arm swings, extends through a suitable bearing, contained ina bossiliv formed onthe rear end of the cover plate 3, and is stepped ina second bearing located at thebottom o f the housing 1. The column 13is bodily rotated to swing the cutter arm, as will be hereafter -described, and the cutter arm is frictionally secured o n the column bymeans of its split hub .13.1 which is drawn together by clamping bolts13.2 as shown in Fig.l2. Also the arm is arranged for verticaladjustmenton the column 13 by means of a screw 13.3whichthreadsvertically into the top of the column and from which the armhub is hung,.such adjustment being made by means ofrfa crank 13l4 afterthe clamping bolts 13.2 have been loosened. l

, Referring particularly to Figs. 3 and 7, rotation of the column 1,3,to swing the cutter arm 8 from sidelto side between the work tables 4and, 5, is accomplished by means of a double acting air cylinder 16,mounted horizontally in the bottom portion of the base 1 and connectedto a crank arm 11 which extends radially from the column 13. Y Y Y VAIn.the form shown the air cylinder 16 comfprises a hollow cylindrical bodyslidably mounted on a fixed piston rod or V reactanceV means 18 whichextends axially through the air cylinder andncarries a Vstationarypiston 19 adapted to slidably rltwithinV the cylinder body. Thecylinderrbody is provided with end caps 20 and 21, having centralglands, notrshown, through which the piston rod 18 extends and thecylinder body, as a whole, shiftsback and forth on the piston rod, alonga pathv at right angles to the column axis. as air under pressureissupplied to the cylinder on `one side or the other of the xed piston19. The column crank arm 11 is connected tothe shiftable cylinder 1Bby'means of ra link 22, which has one end pivotally connected to` theendcapjv21 and the other end `pivotally connected to theendof the crankarm. Thus, as the cylinder 16 Vshifts from side toside on the piston rod18, a turning moment is applied to the armY 11 and the column 13 isaccordingly turned orrotated on its vertical axis.

TheA piston rod 18 extends from side to side of the base 1 and Visrigidly mounted by its ends, independently of `the column 13. on thebase side walls, asshown in Fig. 7. Preferably the'piston rod 18 isreduced at its ends, to provide'shoulders whichmay bear against theinside surface of the base sidewalls, and the reduced 'ends extendthrough' the sidewalls where they are threaded vto receive Vsecuringnuts'23. If desired the base'sidewalls may bereinforced, at the pointswhere the piston'rod 18 is mounted, by means of plates 24 welded, 'orvotherwise `suitably secured, since 'the reactance of the force appliedto the crank arm must .be carried by -the base structure.

As shown the crankarm 11 is rigidly mounted in the column 1'3 Aby meansof .a drive t'of one end of the arm in a transverse bore through thecolumn, so that ythe free end "of the arm projects as a cantilever, andtheunrestrainedrbody ofthe arm is tapered toward the free iend thereofwhere thevpivot connection is made to the link 22. The arm 11 is made ofa tough resilient 4 material, such as hardened chrome vanadium steel,and the taper is formed so that the arm will yield somewhat against theimmediate turning force applied through actuation of the air cylinderi6. Thus as the turning force is applied to the arm 1'1 it is more orless gradually transmitted to the column 13 and the inertia of4thecolumn, and the cutter arm which the column carries,A is overcome insuch a manner that shock load on the parts being moved is obviated.

Also the swinging action of the cutter arm is smoother and moreuniformwith the result that fast action .is obtained in spite of the mass thatmust be moved.

In4 order vto provide against overriding of the cutter arm, when it isoperated without work on thezwork tables to limit its swinging movement,a pair of limit stops 25 and 25 are provided on the piston rod 18. Thesestops are disposedone on eachA side of `the cylinder 16 and are spacedVa suicient distance from the respective ends of the cylinder to allowthe desired maximum extent of travel of the cuttei arm, in eitherdirection between the axes cf the work tables. The limit stops 2,5 and2G may be inthe form of collars slidable on the piston rod 18 and'secured at the desired llocation by means of set screws in thewell'known manner.

Y In the Yoperation of automatic radial arm Shapers the engagement ofthe cutter with the work is regulated by means of a pattern, on whichthe work is mounted, and a coacting guide means which is aligned withthe cutter, the patterndetermining the depth of the out or the extent towhich the cutter moves into the work. In the present device the cutteris moved toward and into the work, which is turned on a iixed axis, andis urgedY toward the work. during the entire shaping operation, by meansof the air cylinder 16 which swings the cutter arm. Thus the guide meanstravels with the cutter arm.

It is desirable, however, to provide a'mean's for cushioningthevengagement of the cutter with the work, so as to prevent shock onthe cutter spindle, and to absorb the inertia of the cutter arm beforethe cutterengages the work. This I have accomplished Aby providing aguide means which will engage the pattern before the cutter engages thework and which will at the same time actuate a braking means to absorbthe force of the cutter arm during the last part of its swinging strokeas the cutter is moved into the work. l I

The improved guide means and braking construction is shown in Figs. 1,2, 5 and 8 and, as shown, comprises a bracket 21, mounted on and belowthe cutter arm 8, and a guide arm V'28pivo tally mounted below thebracket 2'1. The'guide arm 28 extends forwardly from the bracket,generally parallel with the cutter-arm, and carries the pattern engagingguide means at its forward end. TheA bracket 2ll is mounted on a'pairkof laterally spaced posts29 and`30, which are rigidly secured to thecutter arm casting 8.1I and which project vertically downward4therefrom, and a shaft se which extends vertically through'the cutter'arm casting and projects downwardly therefrom at a central'positionforward of the posts 29 and 31). The shaft 3| is vertically slidable inthe cutter arm casting and is hung `from an adjusting screw 3,2, in amanner not shown, soA that it may be raised or lowered in the cutter armin substantially the same way that the cutter arm hub is raised orlowered onthe main vsupporting column 13.V

The bracket 21 is sndabie on the vertical posts 29 and 39 and itshubs,`through which the posts extend, are split, as shown in Fig. 3, andclamped to the posts by means of screws or bolts which extend across thesplit portions in the usual manner.

The guide arm 28 is pivotally mounted on and wholly supported by theshaft 3|, directly below the bracket 21, and is swingable laterallyrelative to the bracket and the cutter arm; and the guide means, whichengage the patterns carried on the work tables 4 and 5, are disposed atthe forward end of the guide arm, below the cutter 9, with their centerslocated at the same distance from the axis of the shaft 3| as the axisof the cutter. In the .form shown the guide means comprise a pair ofrollers 33 and 34 spaced an equal distance laterally on either side ofthe longitudinal center-g line of the guide arm 28 and these 0rollersare freely journaled on vertical stub shafts, mounted on the end of theguide arm, so that they may turn upon engagement with a respectivepattern.

In order to limit the pivotal or swinging movement of the guide arm 28,on the shaft 3| and relative to the cutter arm 8, I provide a rearwardextension 35 on the guide arm which has a transversely disposed head 36located at substantially the same distance, rearwardly, from the axis ofthe shaft 3|, as the posts 29 and 3U; and at each end of the head 36 Iprovide an adjustable stopI screw 31 and 38 each of which has its headend disposed to engage a respective one of the posts 29 and 30. Thus aseither of the guide rollers engages a pattern, as the cutter arm swings-toward the respective work table, the guide arm is caused to swing orshift in the opposite direction on the shaft 3| until the respectivestop screw engages the adjacent one of the posts. This limits themovement of the guide arm relative to the cutter arm and, since theguide arm is carried by the' cutter arm, permits the guide rollers tolimit the movement of the cutter armand the cuttertoward the work.

Normally the pattern engaging surface oi the respective guide means, orroller, is vertically aligned with the .work engaging periphery of thecutter 9 when the cutter is operating on the work, the pattern in thisVcase being of the same size as the nished work; and the adjustable stopscrews 31 and 38 are provided inorder that cornpensation for wear on thecutter may bemade. Ordinarily the guide rollers will be of the sameoutside diameter as the cutter but as the cutter wears and isresharpened its diameter will de-. crease, hence the position of theguide roller relative to the axis of the cutter during the cuttingoperation must be changed or adjusted because the guide rollerdetermines the depth or extent that the cutter enters the work.

The braking of the cutter arm movement and the cushioning of the cutteras it engages the work are accmplished by snubbing the swinging movementof the guide arm 28--35, relative to the cutter varm 8, after the guidemeans has engaged the pattern. In the form shown, the brake or snubbercomprises a spring actuated shoe 39, mounted on a rearwardly anddownwardly ex'- tending arm 40 on the bracket 21, the shoe 39 beingdisposed to face and bear against the rearward face of the head 36 onthe rear portion 35 of the guide arm 28. t

Y VThe shoe 39 is normally urgedl against the head 35 by means of acompression spring 4|, housed in a bore in the arm 40, and,.through thetension or pressure exerted-.by the spring 4|,the 75 clampingheadcarrier rod 49, thereby pressingl 6 shoe 39 is caused to bearcontinuously on-'the head 36 so as to provide a friction braking actionagainst movement of the head 36 relative tothe shoe. The pressure ofthe'spring 4|, urging the shoe against the head 36, may be adjusted bymeans of a threaded plug 42 to vary the braking forceappled on thehead36. This construction is clearly indicated in the schematic view shownin Fig. 8, which is included to aid in visualizing the operativerelation of the cutter arm and guide arm combination.

Asshown inFigs. 2 and 5, the rearwardface of the` head 36 is coveredwith a piece of friction material 43, which is similar to a composlltionbrake lining material. This is done in order to provide greaterfriction than would be hadby simple metal-to-metal contact and tominimize wear on the rear face surface of the head 35.

The work to be' shaped on the work tables 4 and 5 is held in position onthe workvtables by means of the pneumatic clamps 5 and 1, each ofr whichyis arranged with a clamping head disposed directly above the respectivework table in axial alinement therewith. The construction of thesepneumatic clamps is illustrated in Fig. 9 and, as shown, each clampcomprises a hollow body 44, mounted on the upper end of a vertical shaft45 slidably disposed in a boss 46 which isformed as an integral partofthe cover plate rThe body 44 is arranged to t over the upper end ofthe shaft 45 and is clamped thereon by means of one or more set screws41 which extend through the rear end wall of the body and intoengagementwith the shaft.

The clamping head 4B is mounted on the bottom end of a carrier rod 49which extends vertically upward into the forward end of the clamp body44. The rod 49 is slidably disposed in suitable vertically spacedbushings 50 and is Aretained in the body 44 by means of a dowe] pin 5|which extends through the rod 49 and rests upon the upperV coil of ahelical spring 52, which in turn is seated on the bottom wall of thebody 44. The head 48 is rotatably mounted on the end of the rod 49 andthe rod 49 is prevented from turning by allowing one end of the dowelpin 5| to extend through a vertical slot 53 formed in the forward endwall of the body 44. v

The clamping head 48 operates with a reciprocating or up-and-downmovement and is normally heldin a raised or elevated positionfby meansof the spring 52 which vbears upwardly against the dowel pin 5 Loweringof the clamping head 48, to cause it to engage against the work, isaccomplished by means ofa lever 54 which is journaled on a cross pin 55on the upper side ofthe body 44. The lever 54 extends on.

either side of the cross pin 55 with one end bearing against the upperend of the clamping head carrier rod 49 and the other end resting uponthe upper end of. a piston rod 5E which in turn is actuated by a piston51 contained in an air cylinder 58, the air cylinder 58 being xedlymounted in a vertical position within the body 44.

Air for Yactuating the piston 511s supplied through an ,air connection59 which'leads,y by means of a passage 69. from the rear end of thehousing 44. through the housing body at one side of the shaft 45, to thelowerend of the air cylinder "58. Normally the piston 51 is in a loweredposition in the air cylinder 58 and vwhen air-is supplied through thepassage 59, the pistonis raised in the lair cylinder, thereby causingthelever 54 to'rock and press downwardly onA the 7 the rod 49 downwardly,against the laction ofthe spring 52, to causeV the clamping head 48 toengage the work.

When the` air pressure tothe air cylinder 58 is released, the spring 52releases the clamping head 48 from the work by causing the rod 49 tomove upwardly, which action also .rocks the lever 54 in the-oppositedirection and 'causes the piston 151 to return to its lowered position.

As before-mentioned, the shaft 55, on which the work clamp is mounted,is vertically "slidabl'e in the boss45, the purpose of this arrangementbeing to permit vertical adjustment of the position ofthe work clamprelative to the top surface of the work table. When the desired heightor position of the clamp above the work table is obtained, the shaft 45is locked by means of a clamping screw l, actuated by a handle or lever62. The clamping screw 6l extends through the sidewall of .the boss 45and engages in a keyway 63 formed in the adjacent surface of the shaft45.

In the arrangementshown in Fig. 9, vertical adjustment of the shaft 45,which supports the work clamp, is obtained by means of a long screw 64which extends Vfrom the ltop end of the shaft, through a central bore inthe same, into a xed plate 65 which is supported at the bottom end ofvthe shaft by a guide rod 66 threaded into the bottom side'ofthe boss 45and extending downwardly therefrom.

Ihe'screw 64 is kthreaded through a rtapped hole in plate 65 and theplate, which thus acts as 'a xednut, is held against rotation by 'meansof a stud 51 which extends through an opening in a margin of the plate65 and into the wall of a housing 68 formed integrally on the coverplate 3 and varranged to enclose a respective work table supporting anddriving mechanism.

The upper end of the s-crew 54 is provided with a iixed collar 69 whichseats in a counterbore 4l0,

formed in the upper end of the shaft 45, and an upward 'thrust supportfor the collar 69 is pro'- vided byY a cap member 1| which is screwedinto asuit'ably threaded portion of the counterbore 15. As shown, thecap 1| is provided with a central opening through which the upper end 12of the 'screw 64 vextends and the upper end ofthe screw is squared toreceive a. crank, not'sh'own, by means of which the screw is turned.

Thus, when'the clamping screw .6l is'released, the .shaft 45 'will vhangon the collar 69 Yof 'the screw 64 'and by turning the screw 64 it willbe caused Itomove up'and down relative'to the fixed plate ornut65,/thereby eiecting vertical adjustmentiof the shaft 45. y

.As `shown,'the shaft 45 is prevented from turn-v work ztablesrfaremounted in ithe coverjplate 3.'

This :viewis'taken on thelineB-Svo 5 'and shows" the righthandfwork..t'able .5. As' shown, the Work table 'is mounted on'a verticallydisposed 'shaft14 which has its lower end ljournaled'in'a step bearing15 which zin' turn ismountediina bearingsupport 16 secured to`the`bottcmendfof the work table housing G8. The 'work table lis suitab1y`-`keyedetthe upperendof the strait 114,

as .by means of setscrew 11, and immediately below the work table hub isa worm gear 18, which is .also suitably keyed to the shaft 14 by meansof a set screw 19. The gear 18 is driven by a worm 89 and rotation isthus imparted 4to the work table.

As shown, the work table is centered and laterally stabilized by anannular bearing means 8|, which is `made up of several segments andextends around .the inner periphery of the opening inthe .cover plate 3,in which the work table s fset,.. and whichengages an annular dependingrcollar or .ange A82 formed integrally on the bottom. side of the worktable, the ange 82 extending downwardly into the opening in the coverplate `3. Felt pads, .not shown, are disposed between the adjoiningendsof the segments, which make up the bearing ring 8l in order to providemeans yfor lubrication; and the several segments are arranged to beradially adjusted, as by means of the screws BLI shown in Figs. l, 2 and3.

A dust and dirt seal is also provided by an annular gasket 83, which isset into a groove in .the top face Vof the cover plate 3, directly belowthe margin of the work table, which gasket bears upwardly against thework table and serves to seal the edge opening against the passage ofchips or dust.

The Vmeans .for driving the worms which impart rotation to the worktables is shown in Figs. 3 and 6 and comprises a double-acting clutch 84mounted ona shaft 85 which in turn is driven by a vpulley 66; The clutch84 is arranged to drive one orfthe other of a pair of pinions 81 and 88,which in turn are mounted on the shaft 85 on oppositesides of the clutch84 and are mashed with gears 89 and 9G respectively. The pinions 8'1Vand 88, are freely rotatable relative to .the shaft 85 'and are drivensolely through the clutch 84; and the gears 89 and S9 are respectivelymounted on the ends of the worms 8M and as Vshown in Fig. 6.

Power for driving the pulley is supplied by an electric motor 9| (seeFig. 3) which drives a variable speed pulley 92 which in turn isconnected tothe pulley 86 by a V-belt 93. The motor 9i is mounted on atilting bracket 94 which in turn .is xedly supported on a cross shaft 95suitably supported horizontally in the base I.

The purpose of the tilting brace or motor support 9'4 is to vary thedistance between the motor pulley Y92 and 'the pulley 85, which drivesthe clutch mechanism 84, and to thereby cause variation of the eiectivediameter of the variable speed pulley 92, the pulley 92 being of thetype in which both ofthe side disks are axially adjustable relative tothe other and are springloaded toward each other so that by varying thetension on the belt, the movable halves of the pulley are caused toshift along the pulley axis and Achange theeiective pulley diameter.This type of variable speed pulley is well knownfand is available on theopen market.

'Tilting of the motor base 9'4, on the axis of the shaft 95, isaccomplished by turning the shaft 95 by means of -a lever 96 which ismounted on the end of the shaft 95 on 'the outside of the base I, 'asshown in Fig. 4. The lever 95 extends through a sliding block SIarrangedto slide horizontally/between 'a pair of guide-.bars 98 which aremounted on the outside of the sidewall of the base il Tand which arespaced therefrom to permit swinging movement of the lever 96. A clampinglever 99, .threaded vonto an 'outwardly pro- ;iecting'studlntegral'onthe guide bar 91, ispro- 9 vided to clamp the lever 96 to the guidemeans 98 at whatever position the lever 9B might be set. Thus byshifting the lever 96 one way or the other, the tension on the belt 93can be varied to change the effective diameter of the variable speedpulley 92 and hence vary the speed at which the pulley 86 and the worktables are driven.

Details of the double-acting clutch and the means for shifting the sameto cause operation of one table or the other are shown in Figs. 10 and11, the view of Fig. 10 being taken onvthe lline ||0 of Fig. 6. Thedouble-acting clutch shown is a multidisc friction clutch of a wellknownconstruction in which the driving means are keyed to the driving shaft85 and in which an axially shiftable collar atthe center of the clutchis arranged to cause connection of the driving means with one or theother of a pair of oppositely disposed end members or driving cups |00and |0| to which the driven gears 81 and 80 are fastened, the drivingcups being normally lfreely rotatable on the clutch driving shaft 65.

As shown in Figs. and l1, the shaft 85 is journaled in and supportedfrom a pair of hanger brackets |02 and |03, which brackets are in turnlsupported from the bottom side of the cover plate 3; and the clutchmechanism Vtogether with the driven gears 8l and 88 are mounted on'theshaft 85 between the hanger brackets. These hanger brackets also supportthe shifting means by which the shiftable collar |04 of the clutch ismoved axially to cause clutching engagement with one or the other of thedriving cups |00 and |0|.

As shown, the clutch shifting means comprises an air cylinder |05mounted on a piston rod |08 which extends between the brackets |02 and|03 and is fixed thereto. A piston |01 is mounted fast on the piston rod|06 midway'between its @il ends and is formed to t the cylinder |05. Thecylinder is provided with end caps |08 and |08, which have suitableglands, not shown, through which the piston rod |06 extends. The aircylinder |05 is thus bodily shiftable in either direction along thepiston rod |06 and such shifting movement is accomplished by lmeans ofcompressed air which is introduced into one side or the other of the aircylinder through suitable air connections in the end caps, as at l0 andThe connection between the clutch collar |04 and the shiftable aircylinder |05 is obtained by means of a yoke ||2 which is mounted fast tothe air cylinder body and which extends downwardly to embrace the clutchcollar |04 in a'suitable annular groove provided therein. Thus as theair cylinder |05 is shifted to one side or the other the clutchmechanism is likewise actuated to cause driving connection with one orthe other of the driven gears 81 and 88.

Preferably the clutchmechanism is Valso arranged to provide for rotationof both Work tables simultaneously, regardless of the position of theclutch parts, and this is accomplished by means of a jack shaft ||3,disposed parallel .with the axis of theclutch and journaled inthebrackets |02-|03 The jack shaft is provided with a pair of axiallyshiftable pinions ||4 and H5, adapted to be meshed with the gears 87and, 80, respectively, and these pinions are arranged to be vkeyed tothe jack shaft, in asuitable manner, and fixed in a set position. Thus,by meshing the pinions Htl and ||5 with the gears 81 and 88, both ofthe* gears will be driven regardless of the side to which the clutchcollar |04 may be shifted by the air cylinder |05. Otherwise, whenalternate drive of the work tables is desired, disconnection of one orboth of the pinions ||4 and ||5 from the respective gears will leave thegears subject to alternate actuation by the clutch mechanism. e

In the operation of my improved shaper the electric motors and 9| whichdrive the cutter and the Work tables, respectively, are controlled bymagnetic starters, not shown, which in turn are actuated by start andstop push buttons conveniently mounted in a panel I6 lmounted at thefront side of the machine; and the, pneumatic devices which control theAoperation of the cutter arm 8, the table driving clutch 84 and the workclamps 6 and 'I are governed by a foot valve located at the bottom vofthe baseon the front side thereof, which determines the distribution ofthe compressed air by which the pneumatic devices are actuated. Thusthe'operator starts the machine operation by first starting the cutterand table drive motors through the push button station ||6and-thereafter controls the operation solely through the foot valve l1.

The work is machined or shaped on one/of the work tables lwhile theother table is idle and is being unloaded and reloaded. Thus theoperator, havingv iirst fixed suitable patterns on the work tables,places a blank to be formed on the pattern of the idle work table and,by operation of the foot valve causes the respective clamp tc engage thework and hold it securely against the pattern. Simultaneously the clutchmechanism is actuated by means of the air cylinder |05 to shift thedrive to the newly loaded table and the cutter arm 8 is actuated by theair cylinder I6 so as to move toward 'the newly loaded table. As thecutter arm approaches the work table the respective pattern follower orguide roller engages the pattern and the guide arm 28 is caused to pivotorswing against the braking action ofthe spring pressed shoe carried bythe cutter arm. bracketV 21, thus slowing the movement of the cutter armand cushioning the engagement of the cutter with the work. The cutterarm air cylinder l0 acts continuously on the pivoted cutter arm columnand constantly urges the cutter toward the work so that when the guidearm has swung to the'exten't allowed by the stop screws 31--38 thecutter has fully entered the Work and the shaping operation is begun.llContact of the pattern follower 'or guide Vmeans `83--30 controls theposition of the cutter in relation to the' work and, since the cutterarm is constantly urged toward the work during the shapingcycle by meansof'theair cylinder I6, thei'lnished part becomes a duplicate of thepattern contour. y i

During one cutting cycle the opposite work table is'stobned and therespective. clamp is released so that theoperator 'can quickly'removethe finished piece'andreload with a blank 'to be shaped. Thus at thecompletion of each machining cycle the operator merely operates the footvalve to shift the operation to the opposite table.

The several air-cylinders are'actuated simultaneously, however, the workclamps are quick yacting devices, driven by the full air pressure, andact to clamp the work before the respective work table begins itsrotation.V Some time is required to swing the cutter arm 8 to cuttingposition and by the time that the cutter engages the work the l loperation ofthe machine is completely automatic, the control andactuation of the several'operating components of the machine beingentirely under the iniiuence of *he air cylinders 6, 1, I6 and |65,

'and the operator is free to coniine his attention to unloading andreloading the idle work table.

Atypical arrangement of the pneumatic operating and control circuit forthe machine is shown in Fig. 12.V In this system compressed air at apredeterminedpressure is supplied from a suitable source, Ynot shown, toa single supply line H8, from which' the air is distributed to theaircylinders by way of suitable control valves. Preferably' the Yfullair pressure, for example 100 pounds per square inch, is supplied to theair cylinders of the clamps S and 1, and to the clutch operatingcylinder and delivery of the air to the clamps 6 and 1, and to theopposite-endsof the clutch cylinder- |05. is controlled by means of apneumatically actuated master valve H9. Thus-the supply line ||8, whichincludes an air filtery and a suitable air lubricator- |2|', leadsdirectly to the master valve from which the air is supplied alternatelyto the lines |22 and |23 vwhich lead directly to the clamps 6 and 1,respectively, and to the respective ends of the clutch cylinder |05through the branch connections' |24 and |25.

The master valve. ||9 is of the type which, when delivering air to oneline, simultaneously bleeds the alternateline to release the pressuretherein. In this manner, when air is supplied to the line |22Vto actuatethe left'h'and clamp 6 and move the cylinder |05 to the left, the line|23 is opened to atmosphere to release the pressure from the right handclamp 'l and the right side or the cylinder IE5'. It is preferable,however, that the air pressure be released from the clamps atJ aretardedrate iny order to allow time for the cutter to move away from theworkand Afor therespectiveI work table to4 slow or stop I'Oftation beforethe clampis released from the work, thus assuring that, the, work willnot be thrown 4from the table by engagement with the cutter blades ordue to the table rotation, and for that purpose the air lead to eachclampv is provided wit-ha speed valve |25, ofany well known type, whichAcan be adjusted to release ther pressure from the clamp at apredetermined rate. Also, since. it is essential thatmaximum clampingpressure be exertedl by the clamps S and 1 during any operation of; themachine, a pressure switch |2115 connected into the air supply line t0auto- Ymatically open the electric circuits to the table and cutterdrive motors whenever the air pressure drops below a predeterminedminimum. This is a safety factor which assures that the work will besecurely held whenever the cutter is engaged.

As shown, the operation of the master valve I9 and the cutter armcylinder` I6 are controlled 'by the foot valve ||1 to which air issupplied through a branch line |28 connected to the main -supply lineH8. The valve Il'l may be any suitable 3-'way air valve having provisionfor bleedlnfg the Outlet line to which the air is notvbeing supplied;and, as shown,V has two Voutletsf|2l 'table and when this valve is againoperated the machine components all automaticallyshift to operate withrespect to the other work table.

The air pressure delivered by the foot valve lll need not be at fullline pressure and often it is desired to regulate the pressure actuatingthe cutter arm cylinder |5 in order to vary the pressure exerted on thecutter as it engages the work being shaped. For that reasonY aA pressureregulator |3| is installed in the line |28 to the foot valve, whichpressure regulator may include a gauge to indicateA the actual pressurebeiney Supplied- The main advantages of` this invention reside in theyfully automatic operation and control of the working components oi themachine whereby the Y operator-s attention may be coniinedwhollytosimply loading and unloading the idle work table; and in thehighspeed shaping operationv thus permitted which produces a iinished piecesubstantially as fast as the operator can unload and load the idletable.

Other advantagesl reside in the operating arrangement of the machinewhereby a maximum ofV safety is afforded to the operator, thuspermitting operation of the device by relatively unskilled labor withoutdanger of loss or harm to either personnel or material.

Further advantages will be seen in the adaptability of the improvedmechanisms to arrangement most convenient to the operator; particularlyin the disposition of the work tables and the cutter which permits amachine design allowing the operator to Work safely in such closeproximityto the work tables and the machine controls that he can performall necessary movements from a single standing or sitting position.

Still other advantages derive from the ease with which the machine partsmay be adjusted for various sizes of work and to maintain accuracy inthefinished pieces. And still further advantages will be found in thegreatly increased rateY of production of highly accurate, finely nished,shaped parts that is afforded by the high speed automatic dual tableoperation of the device.

Although but one specific embodiment of this invention is herein shownand described it will be understood that numerous details of theconstructionshown may be altered or omitted without departing from thespirit of this invention as defined by the following claims.

I claim:

l. A shaper comprising a base having a pair of spaced horizontallydisposed rotatable work tables mounted thereon., a cutter arm pivotallymounted on said base above said work tables and having a free endswingable .between the axes of said work tables, a rotatable cutter onsaid arm, means to rotate said cutter, means to drive said tables, andmeans to shift said cutter arm alternately from one table to another,said means being adapted to resiliently urge said cutter arm toward theaxis of the table to which it has been shifted. A

24A Shaper comprising a base having a pair of spaced rotatable worktables mounted on vertical axes, means to drive said work tables, acutter arm pivotally mounted on said base behind said work tables andhaving a forwardly extending free end swinfrable horizontally betweensaid work tables, a rotatable cutter carried adjacent the free end rfsaid cutter arm, means to rotate said cutter, and means to shift saidcutter arm toward the axis of one table and then toward the axis of theother table alternately, said means '.1'3 being adapated to yieldablyurge said cutter arm in the direction toward which it has been shifted.

3. A shaper comprising a base having a pair of spaced rotatable worktables mounted on vertical axes, means to drive said work tables, arotatable vertical column extending upwardly from said basev behind saidwork tables, a cutter arm mounted on said column'above said work tablesand having a forwardlyv extending free end swingable horizontally, aspindle extending downwardly from adjacent the free end of said cutterarm and adapted to carry a cutter at its lower end, means to rotate saidspindle, and means to shift said cutter arm toward the axis of one tableand then toward the axis of the other table alter'- nately, said meansbeing adapted to yieldably urge said cutter arm in the direction towardwhich it has been shifted.

4. A shaper comprising a base having a pair of spaced rotatable worlrtables mounted thereon, a

swing of said cutter arm whereby the table toward 'which said cutter armis shifted will be rotated while the other table is stopped.

`5. A Shaper comprising a base having a pair of spaced rotatable worktables mounted thereon, a

cutter arm pivotally mounted on said base and arranged with a free endswingable between the axes of said work tables, a rotatable cuttermounted adjacent the free 'end of said arm and disposed to be engagedwith'work carried by'said tables, means to rotate said cutter, means toshift saidv cutter arm alternately toward one tableand then the other,and drive means for said Vwork tables including clutch mechanism toconnect said drive means with said tables selectively according to thedirection of swing of said cutter arm, said clutch mechanism beingoperable upon swinging of said cutter arm to drive the table towardwhich said arm is moved and to disconnect the other table.

6. A shaper comprising a basehaving-a pair of spaced rotatable Worktables mounted thereon,'a cutter arm pivotally mounted on said base-andarranged with a free end swingable between the Vaxes of said worktables, a rotatable cutter 'mounted' adjacent the free end of said armand disposed to be engagedwith work carried by said tables,"means torotate said cutter, means to shift said cutter arm alternately towardone table and then the other, drive means for said work tables includingclutch mechanism adapted to connect E' said drive means with therespective table toward which said cutter arm is' shifted and'todisconnect the other tacle, and means to actuatesaid clutch mechanismautomatically upon shifting of said cutter arm.

7. A shaper comprising a base having a pair of spaced rotatable worktables mounted thereon, a cutter arm pivotally mounted on said base andhavin"t a free end disposed to swing between the axes of said tables ina plane normal thereto, a rotatable cutter mounted on said arm' anddisposed to engage work carried by said tables,

means to rotate said cutter, means to drive said tables, means to shiftsaid cutter arm alternately 'toward one table and .then the other, andmeans dit) toshiftsaid 'arm from side to side alternately to engage thecutter with work on a respective table, and -means to brake the movementof said arm prior to engagement of the cutter with the work.

y9. A 'shaper comprising a pair of spaced rotatable work tables mountedon vertical axes and having means to drive said tables, a cutter armpivotally'mounted above said Work tables and having -a free enddisposedto swing horizontally between the axes ofsaid tables, a rotatable cuttermounted on said' arm and disposedto project downwardly there-from toengage work carried on said tables, means'to rotate said cutter, meansto swing Asaid armfromside to side alternately to engage said cutterwith work on a respective table, and means to brake the swingingmovement of said arm as said cutter is brought into engagement with thework, said swing means being adapted -tourge said cutter arm resilientlyin the direction it has been shifted and while the cutter is engagedwith the work.

10.'A shaper comprising a pair of spaced work tables mounted to rotateon parallel axes and having means to drive said Work tables, a'cutterarm pivotally mounted on an axis parallel with the axes of said tablesand having a free end extending between the axes' of said tables andswingable therebetween, said cutter arm having a rotatably driven cutterdisposed adjacent 'said free end and arranged to engage work carried onsaid tables, means'to shift said cutter arm from side to sidealternately to engage the cutter with work on a respective table, acutter guide means carried by said cutter arm and disposed to enfgage'apattern mounted on each of the respective Work tables, Vsaid guide meansbeing mounted for independent shifting movement relative to the cutteralongV a path extending transversely through the cutter'axis and beingadapted toengage the respectivepattern in advance of engagement of thecutterwith the work upon shifting movement of said cutter arm, and meansto limit the shifting movementof said guide means.

1 1. A shaper comprising a pair of spaced work tables mounted to rotateon parallel axes and having means to drive said Work tables, acutter arm4p'ivotally mounted on an axis parallel with the axes of said tables andhaving a free end extending between the axes of said tables andswingable therebetween, said cutter arm havingv a rotatably drivencutter disposed adjacent said free end and arranged to engage workcarried `on -said -tables, means to shift said cutter arm from side -toside alternately to engage the cutter with Work on a respective table, acutter guide means carried by said cutter arm and disposed to engage 'apattern mounted on each of the respective work tables, said guide meansbeing of greater transverse width than the diameter of said cutter andbeing mounted for independent shifting movement relative to the cutteralong a path extending transversely through the cutter axis, wherebysaid guide means will engage the respective pattern inadvanceofzengagement of the cutter v with 'the work uponshifting-movement of said cutterarmjand means to' limit the sluitingmovement. of said guide meansto a predetermined extent.

I2; A shaper comprising a pair of spaced work tables mounted to rotateon parallel axes and having means to vdrive said work tables, .a cutter.arm pivotally mounted on an axis parallel with theaxes of said tablesvand having a free end extending between the axesv of said tables'andswingable therebetween, said cutter arm having a rotatably driven cutterdisposed adjacent said free end and arrangedto engage workcarried onsaid tables, means. to shift said cutter arm from side to sidealternately to engage the cutterl with work on a respective table, acutter guide means carried by said cutter arm and disposed to engage apattern mounted on each of the respective work tables, said guide meansbeing of greater transverse width than the diameter of said cutter and vbeing mounted for independent shifting movement relative to the cutteralong a path extending transversely through Vthe cutter axis, wherebysaid guide means will engage the respective pattern in advance ofengagement of the cutter with the work upon shifting movement of saidcutter arm, brake means adapted to resist shifting movement of saidguide means, and means to limit the shifting Vmovement of said guidemeans to a predetermined extent.

13. A shaper comprising a pair of spaced Work tables mounted to rotateon parallel axes and having means to drive said work tables, a cutterarmpivotally mounted on an axis parallel with the axes of said tables andhaving a free end extending between the axes of said tables andswingable therebetween, said cutter arm having a rotatably driven cutterdisposed adjacent said free end and arranged to engage work carried onsaid'tables, means to shift said cutter arm from side to sidealternately to` engage the cutter with work on a respective table, alaterally shiftable guide arm pivotally mounted on said cutter arm andhaving a free end extending across the end of said cutter, laterallyspaced guide members on said guide arm each disposed to engage arespective pattern mounted on said work tables, said guide arm beingadapted to engage a guide member with a respective pattern in advance ofengagement of the cutter with the work upon shifting movement of thecutter arm, and means to limit the shifting movement of said guide armas said cutter moves into the-work.V

14. A Shaper comprising a pair. of spaced work tables mounted to rotateon parallel axes and having means to drive said work tables, a cutterarm pivotally mounted on an axis parallel with the axes of said tablesand having a free end extending between the axes of said tables andswingable therebetween, said cutterarm having a rotatablydriven cutterdisposed adjacent said from side'to side alternately to engage thecutter free end and arranged to engageY work carried on said tables,means to shift said cutter arm with work on a respective table, alaterally shiftable guide arm pivotally mounted on said cutter armandhaving a free end extending across the end of said cutter, laterallyspaced guide members on said guide arm each disposed to engage arespective pattern mounted on said work tables, said guide arm beingadapted to engage a guide member with a respective pattern in advance ofengagement of the cutter with the Wori: and to shift laterally relativeto the cutter as the cutter moves into the. work, brake means associatedwith said guide. arm and adapted to resist shifting movement thereof,and stop means disposed to limit the shifting movement of said guide armto a predetermined extent.

l5. In a radial arm shaping device comprin a cutter arm having a freeendv carrying a rotatable cutter, said cutter being disposed on an axisnormal to the longitudinal axis of the cutter arm, means to rotate-saidcutter, and means to bring said cutter and the work to be shaped intooperative-'engagement with each other, a guide arm pivotally mounted onsaid cutter arm and having a free end extending parallel therewithacross the end of said cutter, a guide member mounted adjacent the freeend oisaid guide arm and disposed to engage apattern positioned belowthe work, said guide member being adapted to engage the pattern inadvance of engagement oi the cutter with the work whereby the g ide armwill shift pivotally relative to said cutter arm as the cutter and thework are brought together, means to brake the relative shifting movementof said guide arm, andl means to limit the said shifting of said guidearm to a predetermined extent.

16. In a radial arm shaping device comprising a cutter arm having a freeend carrying a rotatable cutter, said cutter being disposed on an axisnormal to the longitudinal axis of the cutter arm, means to rotate saidcutter, and means to bring said cutter and the work to be Shaped intooperative engagement with each other, a guide arm pivotally mounted onsaid cutter arm and i having a free end extending parallel therewithacross the end of said cutter, a guide member mounted adjacent the freeendl of said guide arm and disposed to engagea pattern positioned belowthe work, said guide member being adapted to engage the pattern inadvance of engagement of the cutter with the work whereby the guide armis caused to shift pivotally relative to the cutter arm as the cutterand the work are brought together, coacting friction brake means mountedon said cutter arm and said guide arm and adapted to resist the relativeshifting of said guidel arm, and means to limit the said shiftingmovement of said guide arm.

17. In a radial arm shaping device comprising a cutter arm having a freeend carrying a r0- tatable cutter disposed on an axis normal tov thelongitudinal axis of said arm, means to rotate said cutter, spaced workholding means located on opposite sides of the cutter, and means toeffect alternate engagement of said cutter with work v mounted on said,spaced work holding means, a guide arm pivotally mounted on said cutterarm andl extending substantially parallel therewithv across the end ofsaid cutter, a pair of laterally spaced guide members on said guide arm,said guide members being located adjacent said cutter and adapted toengagea pattern disposed below the Work on either of said work holdingrv means, and said guide members being disposedto engage the respectivepattern in advance of engagement of the cutter with the work whereby theguide arm is caused to shift pivotally relative to the cutter arm, andadjustable stop means disposed to limit the extent of the relaivemovement of said guide arm in either direcion.

18. In a radial arm shaping device comprising a cutterarm having a freeend carrying a rotatable cutter disposed on an axis normal to thelongitudinal axis of said arm, means to rotate said cutter. spacedworkholding means located 17 on opposite sides of the cutter, and means toeffect alternate engagement of said cutter with work mounted on saidspaced work holding means, a guide arm pivotally mounted on said cutterarm and extending substantially parallel therewith across the end ofsaid cutter, a pair of laterally spaced guide members on said guide arm,said guide members being located adjacent said cutter and adapted toengage a pattern disposed below the work on either of said work holdingmeans, and said guide members being disposed to engage the respectivepattern in advance of engagement of the cutter with the work whereby theguide arm is caused to shift pivotally relative to the cutter arm, meansadapted to resist the relative shifting movement of said guide arm assaid guide members engage the respective pattern, and adjustable sto-pmeans disposed to limit the extent of the relative movement of saidguide arm in either direction.

19. A shaper comprising a pair of spaced rotatable work tables mountedon vertical axes and having means to drive said tables, a rotatablevertical column mounted medially behind said Work tables, a cutter armmounted at one end on said column and extending forwardly therefrombetween the axes of said werk tables, said cutter arm having a rotatablecutter disposed adjacent its forward end and adapted to engage workmounted on said work tables upon shifting of said cutter arm toward theaxis of a respective table, and means to turn said column on its axisand shift said cutter arm, said means comprising a double actingreciprocal power device having a resilient crank connection with saidcolumn, and reactance means for said power device having iixed supportindependent of said column.

20. A Shaper comprising a pair of spaced rotatable work tables mountedon vertical axes and having means to drive said tables, a rotatablevertical column mounted medially behind said work tables, a cutter armmounted at one end on said column and extending forwardly therefrombetween the axes of said work tables, said cutter arm having a rotatablecutter disposed adjacent its forward end and adapted to engage workmounted on said work tables upon shifting of said cutter arm toward theaxis of a respective table, and means to turn said column on its axisand shift said cutter arm, said means comprising a resilient arm rigidlymounted on said column and extendingradially therefrom, and a doubleacting reciprocal power device driving connection with the outer end ofsaid resilient arm, said power device being adapted to apply continuousturning force to said resilient arm in either direction.

21. In a radial arm shaping device comprising a cutter arm having oneend pivotally mounted and the other end swingable about the pivot axis,said cutter arm having a rotatable cutter adjacent its swingable end andmeans to drive the cutter, a cutter arm shifting means comprising aresiliently yieldable crank arm having xed connection with said cutterarm and eX- tending radially from the pivot axis thereof, and a powerdevice connected to the outer end of said crank arm and disposedto actin a direction at right angles to the pivot axis of said cutter Y arm,said power device being adapted to apply a continuous turning force tosaid crank arm, and said crank arm being yieldable to momentarily bendupon initial application of the turning force.

22. In a radial arm Shaper comprising a cutter arm having one endmounted on a rotatable vertical column and the other end swingablehorizontally about the axis of said column, said cutter arm having arotatable cutter mounted adjacent its swingable end and means to drivethe cutter, means to turn said column in either direction on its axis ofrotation comprising a resiliently yieldable crank arm rigidly connectedto the column and projecting radially therefrom at a location spacedaxially from the cutter arm, a double acting reciprocal power deviceconnected to the outer end of said crank arm and disposed to act in adirection at right angles to the axis of rotation of said column, andreactance means for said power device having iixed support independentof said column, said power device being adapted to apply a continuousturning force to said crank arm in either direction, and said crank armbeing yieldable intermediate its ends to bend momentarily upon initialapplication of forceby said power device.

WILLEM GROEN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,083,160 Villinger Dec. 30,1913v 1,427,297 Johnson Aug. 29, 1922 1,606,308 Lund Nov. 9, 19261,800,450 Hill Apr. 14, 1931 2,107,578 Onsrud Feb. 8, 1938

